== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:54:23 (1788274463)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.01451 s, 11.6 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff948cc9098000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.401626
Iter 1/10: OSS cache speed: 0.386915
Iter 1/10: ladvise speed: 0.539952
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.417287
Iter 2/10: OSS cache speed: 0.376193
Iter 2/10: ladvise speed: 0.50338
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.384919
Iter 3/10: OSS cache speed: 0.379112
Iter 3/10: ladvise speed: 0.426691
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.403661
Iter 4/10: OSS cache speed: 0.527588
Iter 4/10: ladvise speed: 0.411484
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.438791
Iter 5/10: OSS cache speed: 0.415634
Iter 5/10: ladvise speed: 0.367123
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.45022
Iter 6/10: OSS cache speed: 0.418606
Iter 6/10: ladvise speed: 0.386361
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.38401
Iter 7/10: OSS cache speed: 0.417318
Iter 7/10: ladvise speed: 0.408881
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.323891
Iter 8/10: OSS cache speed: 0.459646
Iter 8/10: ladvise speed: 0.394509
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.438562
Iter 9/10: OSS cache speed: 0.453763
Iter 9/10: ladvise speed: 0.49699
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.384592
Iter 10/10: OSS cache speed: 0.451419
Iter 10/10: ladvise speed: 0.466147
Average uncached read: .40
Average speedup with OSS cached read:  .42 = +5%
Average speedup with ladvise willread:  .44 = +10%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0